Pattern appliance.



IVI. A. SILZ L A. PLATZER.

. PATTERN APPLIANCE,

APPucATmN FILED Nov. 4. |916.

Patented May 8, 1917.

2 SHEETS-SHEET l.

M. m M V E Nl. A. SILZ & A. PLATZER.

PATTERN PPLIANCE. APPLmATxoN FILED Nov. 4. 1916.

Patented May8,1917.

2 SHEETS--SHEET 2 Ei/enfans: Mar ai'. ,52.22

fida/f- Z3/aigre? A frequent repetition of such MAX A. SILZ AND ADOLF PLATZER, OF CLEVELAND, OHIO.

PATTERN APPLIANCE.

Specification of Letters Patent.

.Patented May 8, 1917.

Application filed November 4, 1916. Serial No. 129,606.

To all LU/1.0m it may concern.'

Be it known that we, lVLix A. SiLZ and )mehr Pm'rznn. both eitixens of the United States of America, residing at Cleveland, in the county of Cuyahoga` and State of Ohio., have invented a new and useful Improvement in Pattern Appliances, of which the following is a specification, the principle of the invention being herein explained and the best mode in which we have contemplated applying that principle, so as to distinguish it from other inventions.

Our invention relates to a pattern appliance and more particularly to an improvement upon the rapping plate commonly carried thereby, together with parts adapted to functionate in conjunction therewith.

It is common knowledge that a pattern must be loosened before it can be reliably withdrawn from its mold wit-hout having a part of the formed sand clinging to it. Ordinarily therefore the pattern is gently rapped in various directions and this has been accomplished in the case of wooden patterns by driving a pointed pin into some exposed surface and then rapping` the pin. procedure so punctured the available surface as eventually to distort or crack the pattern. To avoid this happening flat rapping plates came into vogue. These were of metal and. set in iush with the surface of the Wood usually by means of screws and with one or more additional tapered holes into which the pin was regularly to be inserted. These protect the pattern and are often specified and the melders compelled to rap using the reinforcement lent thereby. However, the trouble arose that they readily loosened from the pattern especially when the lixing screws were of necessity short, and no remedy has come to our notice.

Accordingly, the object of this invention is to improve upon the manner of securing rapping plates to pattern and to make a rapping pin a permanently attached part thereof and hence preclude the sa1ne`from being mislaid or lost with consequent loss of time.

lVith the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying' drawings, wherein are shown embodiments of the invention, but it is to be understood that other changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

Adver-ting to the drawings:

Figure I is a section showing our invention associated with a portion of a pattern.

Fig. II is a bottom plan.

Fig. III is a mainly sectional view showing a modification of our invention attached to a pattern.

Fig. IV is the pattern.

Fig. V is a top plan of a second modification embodying our invention.

Fig. VI is a section through the middle thereof also showing the surrounding portion of a pattern in section.

Fig. VII is the top plan of a third moditication.

Fig. VIII is a vertical section of the same as well as a portion of the pattern in which it is seated.

Fig. IX isy a similar section of still another modiication, also showing the manner in which one part may be moved. relatively to another.

` A. loose piece 1 of a wooden pattern 1LL is provided in one of its sides with an enlarged flat depression 2 and on its opposite side with a similar depression 3, and connecting these depressions is a bore 4 of somewhat smaller dimension. Fitted into the depression 2 is a metal rapping plate 5 provided on one side with a tapered boss 6 adapted to be tightly driven int-o the bore 4e as appears in Fig. I in which position. the outer surfaces of the pattern 1 and the plate 2 are preferably Hush. rllhe rboss G is hollowed at 7 and provided interiorly with screw threads 8. Communicating from the hollowed interior of the boss 6 with a cut out portion 9 in the outer surface of the plate 5 is a somewhat smaller bore 10. A securing iiange 11 adapted tov occupy the depression 3 is likewise provided at its middle with a boss 12 having exterior screw threads for coperation with those on the boss 6 whereby the two members may be drawn together and thus clamped firmly in place. The flange 11 is similarly provided with a bore 13 in line with the bore 9. Inserted through the plate 5, through the bosses G and 12 and through the liange 11 is a rapping pin 14 having the diameter slightly less than that of the bore 10 and considerably less than that of the bore 13. At opposite ends the pin 14 is prof a topl plan of Fig. III without vvided with heads 15 and 16 respectively, whereby its withdrawal is prevented. The head 15 is adapted to lie within the cutout portion 9, whereas the head 16, while somewhat larger than the bore 10, is slightly smaller than the bore 13. This arrangement permits the pin 14 to be lifted outwardly as suggested by dotted lines in Fig. I, when it is to exercise its function of affording a projecting surface against which light raps are to be delivered in order to loosen the pattern in the sand. During the formation of the mold the pin 14 is bodily hidden within the confines of the pattern and it is moreover impossible to mislay or lose it. The provision of a flange 11 on the opposite side of the pattern for securing the rapping plate proper in place affords a stronger and more durable fastening than the screws heretofore commonly used. a

The modification illustrated by Figs. III and IV resides in providing a pattern 21 with a. depression 22 and extending from it a smaller but closed bore 23. A rapping plate 24 occupies the depression 22` and an integral boss 25 is tightly driven into the bore 23, its tapered surfaces serving to wedge it therein. The boss 25 is itself provided with an opening 26 through which a pin 27 extends for movement down into the bore 23 or outwardly beyond the pattern as indicated in dotted lines in Fig. III. The pin 27 is likewise provided with heads 23 and 29 to prevent its separation. The plate 24 is provided with a cutout portion thereon to be occupied by the head 28 and in this instance is to be secured to the pattern in the usual way by screws 31.

Figs. V and VI illustrate a second modification wherein the pattern 41 is provided with an opening 42 therethrough, which is enlarged at opposite ends. On one side a rapping plate 43 is fitted iiush with the pattern and on the other side a securing flange 44 is adapted to have screw threaded connection with a boss provided on the inner side of the plate 43. The iiange 44 is provided with al square Opening toassist in tightening or loosening the same. A pin 46 extends across a suitable opening in the center of the plate 43 upon which a rapping pin 47 is pivoted, whereby this pin may be swung upwardly or caused to occupy a. suitable depression in the pattern whereby it lies flush or beneath that surface thereof adjacent which the rapping is to be effected. rIhe plate 43 may likewise be secured to the pattern by means of screws not shown).

The modification to which Figs. VII and VIII relate show a pattern 51 provided with a pair of circular openings 52 and 53 and an elongated depression 54 adjacent the opening 53. A metal stamping 55 has two portions 56 and 57 drawn down into the openings 52 and 53 respectively. The lower eX- tremities of such portions arc provided with slits 5S and 59 respectively for a purpose which will presently appear. The stamping 55 is furthermore depressed at 60 to conform to the recess 54. On the opposite side of the pattern is a securing plate 61 having openings opposite the openings 52 and 53. This plate is held in place and secured so as to lock the rapping plate to the pattern by bending over the slits 58 and 59 thereagainst, as is clearly seen in Fig. VIII. Pivoted across the depression 54 by means of oppositely projecting ends 62 is a bent wire rapping pin 63, the ends 62 of which project through suitable openings 64 which are provided in the sides of the depression 60.

In the final modification shown in Fig. IX. a pattern 7l is provided with a recess 72 and extending from it with a bore A. rapping plate 74 occupies the recess 72 anov a boss 75 is forced with its tapered sides 'into the closed bore 73. The plate 74 is secured to the pattern by means of screws 76 and pivotcd at 77 across the hollowcd interior of the boss 75 is a rapping;` pin 73 which may be either swung upwardly or similarly caused to lie just beneath the top surface of the pattern.

IVe claim:

1. A pattern appliance comprising a rapg ping plate and a rapping pin passed through and inseparable from said plate.

2. nl pattern appliance comprising a rapping plate having an opening and a rapping pin passed through said opening and provided near each end with a projection whereby its withdrawal is prevented.

3. A pattern appliance comprising the combination of a hollowed pattern, a rapping plate occupying a portion of such h-ollow and having a plurality of openings, means passed through some of said openings for fastening said plate to the pattern, a hollow boss surrounding one of said openings and firmly seated over the major portion of its lateral surface whereby to hold the plate securely in place and prevent tilting and rocking, and a rapping pin attached .to said plate and adapted to lie in another portion of such hollow.

4. A pattern appliance comprising the combination of a pattern, a rapping plate haif'ing a plurality of openings, means passed through sonic of said openings for fastening said plate to one side of said pattern and a hollow threaded boss surrounding one of such openinO's and firmly .fitted over all in said pattern whereby to resist tilting and loosening and means abutting the opposite side of the pattern and coperating with said screw threads on the boss to hold the plate in position.

5. A pattern appliance comprising the combination with a pattern of a hollow structure set in said pattern and including a llt rapping plate, means for securing the same to the pattern, said plate being provided with an opening to the hollow interior of said structure, and a rapping pin adapted to lie in its entirety within the confines of said structure.

6. A pattern appliance comprising a rapping plate having a plurality ot openings, means for securing said plate to a pattern, one such opening being surrounded by a boss provided with a bore opening therethrough, said bore being enlarged at one end, and a rapping pin and means coacting with said bess for additionally securing the same to a pattern.

T. A. pattern appliance comprising a rapping plate having a plurality ot countersunk openings, one being surrounded by a boss provided with a bore opening therethrough, said bore being enlarged at one end, and a rapping pin loosely mounted in said bore and having a head larger than the smaller part et said bore and adapted to occupy or be partially withdrawn from said enlarged end.

S. A pattern appliance comprising the combination with a pattern having a bore, ot' a rapping plate secured to the pattern and piotided with a boss extending` into said bore, said boss being itseltl fashioned vith a bore extending therethrough and in line with4 said pattern bore, and a rapping' pin movable in said bores and adapted to be entirely inclosed thereby.

9. A pattern appliance comprising the combination with a pattern having a hollow portion, of a rapping plate secured to the pattern and provided with an opening in line with said hollow portion, and a rapping pin movable through said opening and adapted to -be entirely inclosed below said plate.

10. A pattern appliance comprising the combination with a pattern having a hollow portion, of a rapping plate secured to the pattern and provided with an opening in line with said hollow portion and arapping pin movable through said opening and adapted to be entirely inclosed below or partly m-oved above said plate, said pin having projections on opposite sides of said opening whereby to limit its movement in each direction.

11. A pattern appliance comprising the combination with a hollow pattern of a rapping plate occupying a part et such hollow, said plate being provided with an opening to the hollow, and a rapping pin movable through said opening and adapted to lie in its entirety within the contines of said pattern.

1Q. A pattern appliance comprising in combination with a hollowed pattern, of a rapping plate provided with an opening surrounded by a boss, the latter being seated in said pattern, means coacting with said boss for securing the plate to the pattern, and a rapping pin movably connected with said plate and adapted to be wholly confined by said pattern.

'3. A pattern appliance comprising the combination of a pattern, a rapping plate carried thereby, having a boss on one side and provided with a bore extending through said plate and boss, said plate furthermore fashioned with a pair ot' openings, means passed through the latter to secure the plate to the pattern, said boss being insertedinto said pattern whereby to resist tilting and loosening, and a rapping pin movably associated with said plate and adapted to assume a position in said bore and to one side of the plane ot' the outer surtface ot said plate.

1l. A pattern appliance comprising the combination with a pattern et a rapping plate on one side thereot, a member engaging the opposite side, means for clamping said plate and member lirnily in position and a raiiping pin movably carried by one of said elements ,and adapted to occupy a position within the contines ol the pattern.

l5. A pattern appliance comprising the combination with a pattern having an opening theretlnough, a rapping plate set in said opening, a member engaging the opposite side ot tire pattern, said plate and member being in screw-tnreaded connection with each other, and a rapping pin movably attached to one ot said parts in screw-threaded connection and adapted to lie within the coniines ot said opening.

1G. A pattern appliance comprising the combination with a hollow pattern ot a rapping plate on one side thereof, a member engaging the opposite side, means including parts of said elements adapted to eoact interiorly ot said pattern for detachably clamping said plate and member firmly in position, and a rapping pin adapted to be completely conned within said pattern.

1?. A pattern appliance comprising the combination with a pattern ot' a rapping plate on one side thereo', a member engagingpthe opposite side, one of said elements including a part inserted into said pattern and adapted to engage the other, and a rap-y ping pin inseparably carried by one of said elements and movable relatively thereto.

18. A pattern appliance comprising the combination with a pattern of a rapping plate on one side thereof, a member engaging the opposite side, one of said elements including a part inserted into said pattern and adapted to engage the other, and a rapping pin loosely carried by one of said elements and adapted to lie within the joint confining space thereof.

19. A pattern appliance comprising the combination with a hollow pattern of a rapping pin movably carried by said pattern and adapted to occupy a position wholly within the hollow thereof.

20. A pattern appliance comprising a rapping plate, means whereby it may be secured to a pattern, said plate having` a bore of vgreater length than the depth of the major portion of said plate, and a rapping pin loosely connected in said bore, irremovable therefrom and adapted to assume a position inward of the eonnes of the pattern.

2l. A pattern appliance comprising a rapping` plate, means whereby it may be secured to apattern, said plate having a boss provided with a bore, and a rapping pin loosely secured in said bore and adapted in its entirety to occupy a position below the top surface oi said plate.

22. A pattern appliance comprising the combination with a pattern of a rapping plate having an opening' and a rappingpin passed through said openingand provided near each end with a projection whereby its withdrawal is prevented, said pattern being hollowed whereby to completely inclose said pin. I

A pattern appliance comprising a hollow pattern7 a rapping plate set in so as to be substantially flush with one side of said pattern, and a rapping pin connected with and inseparable from said plate, said pin being adapted bodily to assume a position inwardly of such side of the pattern.

211:. A pattern appliance comprising a hollow pattern, a rappingplate having an opening in communication with such hollow Copies of this patent may be obtained for portion and a rappingjr pin loosely attached in the opening,` of said plate and adapted bodily to project inwardly beyond the pla-ne of the outer side of said plate.

25. A pattern appliance comprising a pattern having a rapping pin inseparably connected therewith.

26. A pattern appliance comprising a pattern having a rapping pin inseparably con.- nected therewith and movable relatively thereto. v

27. A pattern appliance comprising a hollow pattern haw/ing a rapping' pin inseparably connected therewith and adapted to occupy a position wholly within the confines thereof.

28. A pattern appliance comprising a hollow pattern, a rapping plate secured in a portion of the hollow oi said pattern, and a rapping pin movably connected to said plate and completely accommodable within said pattern for the purpose specified.

29. A pattern appliance comprising a wooden pattern having a hollowed portion opening through one side thereof, a metal rapping plate secured at such opening, and a rapping` pin inovably connected to said plate within the conlinesvof said pattern and adapted to project in part outwardly beyond or wholly into said hollowed portion.

Signed by us, this 30th day of October, 1916.

MAX A. SILZ. ADOLF PLATZER.

Washington, D. C. 

